Just for the archives, a partial answer to my question:
I was unable to find a definition for the Sinput environment that would
work, but relatively minor changes to some of the RweaveLatex functions
cause Sweave to generate SaveVerbatim environments rather than Sinput
environments, and
I'm trying to put together a poster using the LaTeX a0poster package and
including some things from pstricks to get gradient shading, etc.
The problem is that the default environments used by Sweave don't work
where I need them. A simple code chunk like
eval=FALSE=
x - 1
@
buried in a
